Specifically looking for recipes that are relatively cheap, filling, and aren’t too time-consuming so I can keep up a routine without getting burned out. I have a 10 cup rice cooker so rice combined with other things would be pretty easy. I have a Costco membership and there’s a restaurant supply store near me, as well.
I’ve been to sikh and hare Krishna temples where they give free food to all kinds of people, way more than 50. So curries, stews, all kinds of wet food you can mop up with some rice or bread are always the best bet for these places. Many Indian or south Asian dishes are very easily scalable once you know how to make them.
When I did food not bombs we would also make big batches of pasta and minestrone soup, but soup is trickier because you need a deep plate to serve it on and spoons to eat it. Pasta on the other hand, you just need to decide on a sauce and make a huge batch of it.